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mdbx: add MDBX_DBG_LEGACY_OVERLAP.

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Change-Id: I7aecb925b553587efd6698dc3d52682ca98aa950
This commit is contained in:
Leonid Yuriev 2020-02-02 15:05:32 +03:00
parent 01f65bc872
commit e475db7ade
2 changed files with 36 additions and 18 deletions
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32
mdbx.h
View File

@ -833,13 +833,24 @@ typedef struct iovec MDBX_val;
* but MDBX_DBG_ASSERT, MDBX_DBG_AUDIT and MDBX_DBG_JITTER only if libmdbx
* builded with MDBX_DEBUG. */
#define MDBX_DBG_ASSERT 1 /* Enable assertion checks */
#define MDBX_DBG_AUDIT 2 /* Enable pages usage audit at commit transactions */
#define MDBX_DBG_JITTER 4 /* Enable small random delays in critical points */
#define MDBX_DBG_DUMP /* Include or not meta-pages in coredump files, MAY \
affect performance in MDBX_WRITEMAP mode */ \
8
#define MDBX_DBG_LEGACY_MULTIOPEN 16 /* Enable multi-opening environment(s) */
/* Enable assertion checks */
#define MDBX_DBG_ASSERT 1
/* Enable pages usage audit at commit transactions */
#define MDBX_DBG_AUDIT 2
/* Enable small random delays in critical points */
#define MDBX_DBG_JITTER 4
/* Include or not meta-pages in coredump files,
* MAY affect performance in MDBX_WRITEMAP mode */
#define MDBX_DBG_DUMP 8
/* Allow multi-opening environment(s) */
#define MDBX_DBG_LEGACY_MULTIOPEN 16
/* Allow read and write transactions overlapping for the same thread */
#define MDBX_DBG_LEGACY_OVERLAP 32
/* A debug-logger callback function,
* called before printing the message and aborting.
@ -849,7 +860,12 @@ typedef struct iovec MDBX_val;
typedef void MDBX_debug_func(int loglevel, const char *function, int line,
const char *msg, va_list args);
/* FIXME: Complete description */
/* Don't change current settings */
#define MDBX_LOG_DONTCHANGE (-1)
#define MDBX_DBG_DONTCHANGE (-1)
#define MDBX_LOGGER_DONTCHANGE ((MDBX_debug_func *)(intptr_t)-1)
/* Setup global log-level, debug options and debug logger. */
LIBMDBX_API int mdbx_setup_debug(int loglevel, int flags,
MDBX_debug_func *logger);

22
src/elements/core.c
View File

@ -5972,7 +5972,8 @@ static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) {
if (unlikely(txn->mt_owner == tid))
return MDBX_BUSY;
MDBX_lockinfo *const lck = env->me_lck;
if (lck && (env->me_flags & MDBX_NOTLS) == 0) {
if (lck && (env->me_flags & MDBX_NOTLS) == 0 &&
(mdbx_runtime_flags & MDBX_DBG_LEGACY_OVERLAP) == 0) {
const unsigned snap_nreaders = lck->mti_numreaders;
for (unsigned i = 0; i < snap_nreaders; ++i) {
if (lck->mti_readers[i].mr_pid == env->me_pid &&
@ -6213,7 +6214,9 @@ int mdbx_txn_begin(MDBX_env *env, MDBX_txn *parent, unsigned flags,
size = env->me_maxdbs * (sizeof(MDBX_db) + sizeof(MDBX_cursor *) + 1);
size += tsize = sizeof(MDBX_txn);
} else if (flags & MDBX_RDONLY) {
if (env->me_txn0 && unlikely(env->me_txn0->mt_owner == mdbx_thread_self()))
if (env->me_txn0 &&
unlikely(env->me_txn0->mt_owner == mdbx_thread_self()) &&
(mdbx_runtime_flags & MDBX_DBG_LEGACY_OVERLAP) == 0)
return MDBX_TXN_OVERLAPPING;
size = env->me_maxdbs * (sizeof(MDBX_db) + 1);
size += tsize = sizeof(MDBX_txn);
@ -16532,21 +16535,20 @@ int __cold mdbx_setup_debug(int loglevel, int flags, MDBX_debug_func *logger) {
#if !MDBX_DEBUG
(void)loglevel;
#else
if (loglevel != -1)
if (loglevel != MDBX_LOG_DONTCHANGE)
mdbx_loglevel = (uint8_t)loglevel;
#endif
if (flags != -1) {
#if !MDBX_DEBUG
flags &= MDBX_DBG_DUMP | MDBX_DBG_LEGACY_MULTIOPEN;
#else
flags &= MDBX_DBG_ASSERT | MDBX_DBG_AUDIT | MDBX_DBG_JITTER |
MDBX_DBG_DUMP | MDBX_DBG_LEGACY_MULTIOPEN;
if (flags != MDBX_DBG_DONTCHANGE) {
flags &=
#if MDBX_DEBUG
MDBX_DBG_ASSERT | MDBX_DBG_AUDIT | MDBX_DBG_JITTER |
#endif
MDBX_DBG_DUMP | MDBX_DBG_LEGACY_MULTIOPEN | MDBX_DBG_LEGACY_OVERLAP;
mdbx_runtime_flags = (uint8_t)flags;
}
if (-1 != (intptr_t)logger)
if (logger != MDBX_LOGGER_DONTCHANGE)
mdbx_debug_logger = logger;
return rc;
}